Visual Illusions 9B by https://padlet.com/janepalliser/1kcoyp6kpzgctvwx Instructions: 1. Search through the resources below and pick one visual illusion you really like. 2. Among the resources listed you will find literally hundreds to pick from along with explanations of why they work. Your job is figure out a neuroscience-based explanation about how the illusion works and prepare a presentation for your classmates. Be sure to, at minimum, address the following questions: Describe your optical illusion, what do we see/not see? Describe the neural bases of how your illusion works. What does your optical illusion tell us about the visual system? Include any other interesting information that you’d like to share about the illusion -- (e.g., a certain artist would make use of it, it is the basis of cinema, only works for some people, etc.) 3. Once your presentation is complete, click your section's column and upload all your material as blog post. 4. Comment on two other blog posts from your peers and reply to any comments on yours. en-us 2021-10-18 19:43:08 UTC 2023-03-28 18:52:52 UTC hello@padlet.com https://padlet.net/icons/png/1f5e3.png What do we see? https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845656274 1. We can observe several circles with little blue, green, white and black circles, shaped in a way that it looks like a rotating snake. We can see them moving like they are rotating on their own spaces.


]]> 2021-10-26 16:43:57 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845656274 Describe your optical illusion, what do we see/not see? https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845714647 2021-10-26 17:02:30 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845714647 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845725583 2021-10-26 17:06:15 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845725583 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845726420
  • Describe your optical illusion, what do we see/not see?


    • ]]>     2021-10-26 17:06:33 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845726420     https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845732308 2021-10-26 17:08:34 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845732308 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845733714 FRASER SPIRAL ]]> 2021-10-26 17:09:03 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845733714 How does it works https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845734040 2. The peripheral drift illusion is a perception of movement in a static image and it's caused by the brain's interpretation of patterns seen outside of the eye's area of focus. If one stares at a fixed point in the image the motion disappears in the area of focus.
    https://whatis.techtarget.com/definition/peripheral-drift-illusion ]]>     2021-10-26 17:09:09 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845734040     https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845737410 Fraser's spiral, also known as false spiral, or twisted cord illusion might seem like a spiral formed by a rope of two different colors. However, it actually consists of concentric circles of twisted cords.  The visual distortion is produced by combining a regular line pattern (the circles) with misaligned parts (the differently colored strands).]]> 2021-10-26 17:10:19 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845737410 science https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845742559 1- We can see two persons in the same image, in one vision of the image we can see an women looking backwards to us but in an other vision we can see an old lady just like a witch.
    ]]>     2021-10-26 17:12:11 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845742559     A related illusion is the watercolor effect: the region between the square frames appears to have a faint color, but is actually white. https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845753568 2021-10-26 17:15:33 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845753568 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845759125 2021-10-26 17:17:30 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845759125 The Pisa Tower Illusion https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845764028 This optical illusion happens because our brain sees both images as one scene. " Two tall structures that are actually parallel, like two towers, will actually converge on the two-dimensional surface of the photo when photgraphed from below. [...] if two towers do not converge on the surface of a photo or image, as they do not in the Leaning Tower Illusion, our brain interprets the towers as diverging in real life." 
    references:
    https://www.scientificamerican.com/slideshow/169-best-illusions/
    https://www.illusionsindex.org/i/leaning-tower-illusion]]>     2021-10-26 17:19:09 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845764028     https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845765511 2- After "viewing" the image, the brain continues to process it subconsciously. This implies that your eyes are always attempting to figure out what they're seeing, and your brain is always guiding them where to look next.]]> 2021-10-26 17:19:39 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845765511 What does your optical illusion tell us about the visual system https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845767957 2021-10-26 17:20:32 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845767957 Müller-Lyer illusion https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845775589 The Müller-Lyer illusion is a image or and object, where two horizontal bars are the same lenght but one appers to be much longer than the other one. This happens because ]]> 2021-10-26 17:23:03 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845775589 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845785878 Visual perception is a dynamic process that goes much beyond simply replicating the visual information provided by the retina and compel the brain to make decisions about how we perceive things.]]> 2021-10-26 17:26:31 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1845785878 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854427521 2021-10-29 17:06:39 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854427521 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854438079 When the fins are pointing in toward the shaft of the line, we perceive it as sloping away much like the corner of a building.]]> 2021-10-29 17:11:52 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854438079 The vase illusion https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854450873 2021-10-29 17:18:13 UTC https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854450873 https://padlet.com/janepalliser/1kcoyp6kpzgctvwx/wish/1854461740 What do we see/not see?
    It is possible to see and identify a vase or two people facing each other in profile.

    Describe how your illusion works.
    If you focus on the white figure, you will see a vase, although, if you focus on the black figures, you will see two people facing each other in profile.

    What does your optical illusion tell us about the visual system?
    When two images are captured by our visual system and brain, and one of the images is seen as the background and one as a figure, our brain immediately used a shaping effect in which emerges from the common borders of the images captured and creates this distinction.
    Usually, our brain classifies images according to what surrounds the figures. That creates the depth, height and etc. In the case of this optical illusion, since both counters are ambiguous (open to more than one interpretation; having a double meaning), our brain can interpret both the black or white areas as background or figure.

    Curiosity
    This optical illusion involves cognitive processing, so, with out prior knowledge of both figures of the two profile people and the vase, these reversible figures couldn't be alternately identified by our brain. 



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